Hi All,
Im using latest proxmox on 2 x Intel m2/nvme SSD Drives (brand new, 0% usage). This is for the system only - Mirrored/ZFS
I also have 2 x Dell SAS SSDs for VM storage - Mirrored/ZFS
System was all working nicely BEFORE I put the machine into a new case. I moved cards around and potentially, I also moved the VM_Storage pool to a HBA instead of the onboard SAS ports - I can't recall.
The system gets a unrecoverable IO error when I have all 4 disks in - that is VM_Storage' and the system boot storage. When I remove the VM_Storage disks which as you can guess, it has my VMs on it, the system boots and runs just fine.
Now.....
If I boot the system without the 2 x VM_Storage disks, then insert only 1 disk once proxmox is up and running and run the zfs command I see this - as you'd expect, given only 1 of the disks is installed.
I give it 5-10mins to stablise and insert the 2nd disk and run again
All looks great. But then I reboot and I get the rpool has detected an unrecoverable IO failure. The IO errors it was complaining about related to the rpool, not the VM_Storage oddly enough
Once the its booted and the system is running you can see the error and a zfs rpool clear doesnt fix the issue
Hopefully someone can help!
Thanks
Im using latest proxmox on 2 x Intel m2/nvme SSD Drives (brand new, 0% usage). This is for the system only - Mirrored/ZFS
I also have 2 x Dell SAS SSDs for VM storage - Mirrored/ZFS
System was all working nicely BEFORE I put the machine into a new case. I moved cards around and potentially, I also moved the VM_Storage pool to a HBA instead of the onboard SAS ports - I can't recall.
The system gets a unrecoverable IO error when I have all 4 disks in - that is VM_Storage' and the system boot storage. When I remove the VM_Storage disks which as you can guess, it has my VMs on it, the system boots and runs just fine.
Now.....
If I boot the system without the 2 x VM_Storage disks, then insert only 1 disk once proxmox is up and running and run the zfs command I see this - as you'd expect, given only 1 of the disks is installed.
Code:
root@Proxmox:~# zpool status -v
pool: VM_Storage
state: DEGRADED
status: One or more devices could not be used because the label is missing or
invalid. Sufficient replicas exist for the pool to continue
functioning in a degraded state.
action: Replace the device using 'zpool replace'.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-4J
scan: resilvered 1.30M in 00:00:00 with 0 errors on Tue Dec 16 12:56:08 2025
config:
NAME STATE READ WRITE CKSUM
VM_Storage DEGRADED 0 0 0
mirror-0 DEGRADED 0 0 0
scsi-35002538a48b2ad10 ONLINE 0 0 0
15463254570385615369 UNAVAIL 0 0 0 was /dev/disk/by-id/scsi-35002538a48b2ad30-part1
errors: No known data errors
pool: rpool
state: ONLINE
scan: resilvered 54.2M in 00:00:00 with 0 errors on Tue Dec 16 13:06:27 2025
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
ata-INTEL_SSDSCKKB480G8_BTYH12120Q93480K-part3 ONLINE 0 0 0
ata-INTEL_SSDSCKKB480G8_BTYH12120U9X480K-part3 ONLINE 0 0 0
errors: No known data errors
root@Proxmox:~#I give it 5-10mins to stablise and insert the 2nd disk and run again
Code:
root@Proxmox:~# zpool status -v
pool: VM_Storage
state: ONLINE
scan: resilvered 832K in 00:00:00 with 0 errors on Tue Dec 16 13:28:05 2025
config:
NAME STATE READ WRITE CKSUM
VM_Storage ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
scsi-35002538a48b2ad10 ONLINE 0 0 0
scsi-35002538a48b2ad30 ONLINE 0 0 0
errors: No known data errors
pool: rpool
state: ONLINE
scan: resilvered 54.2M in 00:00:00 with 0 errors on Tue Dec 16 13:06:27 2025
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
ata-INTEL_SSDSCKKB480G8_BTYH12120Q93480K-part3 ONLINE 0 0 0
ata-INTEL_SSDSCKKB480G8_BTYH12120U9X480K-part3 ONLINE 0 0 0
errors: No known data errors
root@Proxmox:~#All looks great. But then I reboot and I get the rpool has detected an unrecoverable IO failure. The IO errors it was complaining about related to the rpool, not the VM_Storage oddly enough
Once the its booted and the system is running you can see the error and a zfs rpool clear doesnt fix the issue
Code:
pool: rpool
state: SUSPENDED
status: One or more devices are faulted in response to IO failures.
action: Make sure the affected devices are connected, then run 'zpool clear'.
see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-HC
scan: resilvered 54.2M in 00:00:00 with 0 errors on Tue Dec 16 13:06:27 2025
config:
NAME STATE READ WRITE CKSUM
rpool DEGRADED 0 0 0
mirror-0 DEGRADED 3 16 0
ata-INTEL_SSDSCKKB480G8_BTYH12120Q93480K-part3 REMOVED 0 0 0
ata-INTEL_SSDSCKKB480G8_BTYH12120U9X480K-part3 ONLINE 3 16 0
errors: List of errors unavailable: pool I/O is currently suspendedHopefully someone can help!
Thanks
Last edited:
